diff options
author | Alistair Francis <alistair23@gmail.com> | 2015-03-11 13:21:05 +0000 |
---|---|---|
committer | Peter Maydell <peter.maydell@linaro.org> | 2015-03-11 13:21:05 +0000 |
commit | be2847051421119f64a0134b5654a5134658d379 (patch) | |
tree | 26da62fe6f35a2b5dda53b020763e5e3f121423c | |
parent | 886bc7a0492ff5d3b6c42157afff827b68595c34 (diff) |
stm32f2xx_timer: Add the stm32f2xx Timer
This patch adds the stm32f2xx timers: TIM2, TIM3, TIM4 and TIM5
to QEMU.
Signed-off-by: Alistair Francis <alistair@alistair23.me>
Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Message-id: 155091a323390f8da3cca496e4c611c493e62a77.1424175342.git.alistair@alistair23.me
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
-rw-r--r-- | default-configs/arm-softmmu.mak | 1 | ||||
-rw-r--r-- | hw/timer/Makefile.objs | 2 | ||||
-rw-r--r-- | hw/timer/stm32f2xx_timer.c | 328 | ||||
-rw-r--r-- | include/hw/timer/stm32f2xx_timer.h | 101 |
4 files changed, 432 insertions, 0 deletions
diff --git a/default-configs/arm-softmmu.mak b/default-configs/arm-softmmu.mak index 149ae1b595..bdb6eeba47 100644 --- a/default-configs/arm-softmmu.mak +++ b/default-configs/arm-softmmu.mak @@ -80,6 +80,7 @@ CONFIG_NSERIES=y CONFIG_REALVIEW=y CONFIG_ZAURUS=y CONFIG_ZYNQ=y +CONFIG_STM32F2XX_TIMER=y CONFIG_VERSATILE_PCI=y CONFIG_VERSATILE_I2C=y diff --git a/hw/timer/Makefile.objs b/hw/timer/Makefile.objs index 2c86c3d412..133bd0d455 100644 --- a/hw/timer/Makefile.objs +++ b/hw/timer/Makefile.objs @@ -31,3 +31,5 @@ obj-$(CONFIG_DIGIC) += digic-timer.o obj-$(CONFIG_MC146818RTC) += mc146818rtc.o obj-$(CONFIG_ALLWINNER_A10_PIT) += allwinner-a10-pit.o + +common-obj-$(CONFIG_STM32F2XX_TIMER) += stm32f2xx_timer.o diff --git a/hw/timer/stm32f2xx_timer.c b/hw/timer/stm32f2xx_timer.c new file mode 100644 index 0000000000..ecadf9df85 --- /dev/null +++ b/hw/timer/stm32f2xx_timer.c @@ -0,0 +1,328 @@ +/* + * STM32F2XX Timer + * + * Copyright (c) 2014 Alistair Francis <alistair@alistair23.me> + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ + +#include "hw/timer/stm32f2xx_timer.h" + +#ifndef STM_TIMER_ERR_DEBUG +#define STM_TIMER_ERR_DEBUG 0 +#endif + +#define DB_PRINT_L(lvl, fmt, args...) do { \ + if (STM_TIMER_ERR_DEBUG >= lvl) { \ + qemu_log("%s: " fmt, __func__, ## args); \ + } \ +} while (0); + +#define DB_PRINT(fmt, args...) DB_PRINT_L(1, fmt, ## args) + +static void stm32f2xx_timer_set_alarm(STM32F2XXTimerState *s, int64_t now); + +static void stm32f2xx_timer_interrupt(void *opaque) +{ + STM32F2XXTimerState *s = opaque; + + DB_PRINT("Interrupt\n"); + + if (s->tim_dier & TIM_DIER_UIE && s->tim_cr1 & TIM_CR1_CEN) { + s->tim_sr |= 1; + qemu_irq_pulse(s->irq); + stm32f2xx_timer_set_alarm(s, s->hit_time); + } +} + +static inline int64_t stm32f2xx_ns_to_ticks(STM32F2XXTimerState *s, int64_t t) +{ + return muldiv64(t, s->freq_hz, 1000000000ULL) / (s->tim_psc + 1); +} + +static void stm32f2xx_timer_set_alarm(STM32F2XXTimerState *s, int64_t now) +{ + uint64_t ticks; + int64_t now_ticks; + + if (s->tim_arr == 0) { + return; + } + + DB_PRINT("Alarm set at: 0x%x\n", s->tim_cr1); + + now_ticks = stm32f2xx_ns_to_ticks(s, now); + ticks = s->tim_arr - (now_ticks - s->tick_offset); + + DB_PRINT("Alarm set in %d ticks\n", (int) ticks); + + s->hit_time = muldiv64((ticks + (uint64_t) now_ticks) * (s->tim_psc + 1), + 1000000000ULL, s->freq_hz); + + timer_mod(s->timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + s->hit_time); + DB_PRINT("Wait Time: %" PRId64 " ticks\n", s->hit_time); +} + +static void stm32f2xx_timer_reset(DeviceState *dev) +{ + STM32F2XXTimerState *s = STM32F2XXTIMER(dev); + int64_t now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); + + s->tim_cr1 = 0; + s->tim_cr2 = 0; + s->tim_smcr = 0; + s->tim_dier = 0; + s->tim_sr = 0; + s->tim_egr = 0; + s->tim_ccmr1 = 0; + s->tim_ccmr2 = 0; + s->tim_ccer = 0; + s->tim_psc = 0; + s->tim_arr = 0; + s->tim_ccr1 = 0; + s->tim_ccr2 = 0; + s->tim_ccr3 = 0; + s->tim_ccr4 = 0; + s->tim_dcr = 0; + s->tim_dmar = 0; + s->tim_or = 0; + + s->tick_offset = stm32f2xx_ns_to_ticks(s, now); +} + +static uint64_t stm32f2xx_timer_read(void *opaque, hwaddr offset, + unsigned size) +{ + STM32F2XXTimerState *s = opaque; + + DB_PRINT("Read 0x%"HWADDR_PRIx"\n", offset); + + switch (offset) { + case TIM_CR1: + return s->tim_cr1; + case TIM_CR2: + return s->tim_cr2; + case TIM_SMCR: + return s->tim_smcr; + case TIM_DIER: + return s->tim_dier; + case TIM_SR: + return s->tim_sr; + case TIM_EGR: + return s->tim_egr; + case TIM_CCMR1: + return s->tim_ccmr1; + case TIM_CCMR2: + return s->tim_ccmr2; + case TIM_CCER: + return s->tim_ccer; + case TIM_CNT: + return stm32f2xx_ns_to_ticks(s, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL)) - + s->tick_offset; + case TIM_PSC: + return s->tim_psc; + case TIM_ARR: + return s->tim_arr; + case TIM_CCR1: + return s->tim_ccr1; + case TIM_CCR2: + return s->tim_ccr2; + case TIM_CCR3: + return s->tim_ccr3; + case TIM_CCR4: + return s->tim_ccr4; + case TIM_DCR: + return s->tim_dcr; + case TIM_DMAR: + return s->tim_dmar; + case TIM_OR: + return s->tim_or; + default: + qemu_log_mask(LOG_GUEST_ERROR, + "%s: Bad offset 0x%"HWADDR_PRIx"\n", __func__, offset); + } + + return 0; +} + +static void stm32f2xx_timer_write(void *opaque, hwaddr offset, + uint64_t val64, unsigned size) +{ + STM32F2XXTimerState *s = opaque; + uint32_t value = val64; + int64_t now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); + uint32_t timer_val = 0; + + DB_PRINT("Write 0x%x, 0x%"HWADDR_PRIx"\n", value, offset); + + switch (offset) { + case TIM_CR1: + s->tim_cr1 = value; + return; + case TIM_CR2: + s->tim_cr2 = value; + return; + case TIM_SMCR: + s->tim_smcr = value; + return; + case TIM_DIER: + s->tim_dier = value; + return; + case TIM_SR: + /* This is set by hardware and cleared by software */ + s->tim_sr &= value; + return; + case TIM_EGR: + s->tim_egr = value; + if (s->tim_egr & TIM_EGR_UG) { + timer_val = 0; + break; + } + return; + case TIM_CCMR1: + s->tim_ccmr1 = value; + return; + case TIM_CCMR2: + s->tim_ccmr2 = value; + return; + case TIM_CCER: + s->tim_ccer = value; + return; + case TIM_PSC: + timer_val = stm32f2xx_ns_to_ticks(s, now) - s->tick_offset; + s->tim_psc = value; + value = timer_val; + break; + case TIM_CNT: + timer_val = value; + break; + case TIM_ARR: + s->tim_arr = value; + stm32f2xx_timer_set_alarm(s, now); + return; + case TIM_CCR1: + s->tim_ccr1 = value; + return; + case TIM_CCR2: + s->tim_ccr2 = value; + return; + case TIM_CCR3: + s->tim_ccr3 = value; + return; + case TIM_CCR4: + s->tim_ccr4 = value; + return; + case TIM_DCR: + s->tim_dcr = value; + return; + case TIM_DMAR: + s->tim_dmar = value; + return; + case TIM_OR: + s->tim_or = value; + return; + default: + qemu_log_mask(LOG_GUEST_ERROR, + "%s: Bad offset 0x%"HWADDR_PRIx"\n", __func__, offset); + return; + } + + /* This means that a register write has affected the timer in a way that + * requires a refresh of both tick_offset and the alarm. + */ + s->tick_offset = stm32f2xx_ns_to_ticks(s, now) - timer_val; + stm32f2xx_timer_set_alarm(s, now); +} + +static const MemoryRegionOps stm32f2xx_timer_ops = { + .read = stm32f2xx_timer_read, + .write = stm32f2xx_timer_write, + .endianness = DEVICE_NATIVE_ENDIAN, +}; + +static const VMStateDescription vmstate_stm32f2xx_timer = { + .name = TYPE_STM32F2XX_TIMER, + .version_id = 1, + .minimum_version_id = 1, + .fields = (VMStateField[]) { + VMSTATE_INT64(tick_offset, STM32F2XXTimerState), + VMSTATE_UINT32(tim_cr1, STM32F2XXTimerState), + VMSTATE_UINT32(tim_cr2, STM32F2XXTimerState), + VMSTATE_UINT32(tim_smcr, STM32F2XXTimerState), + VMSTATE_UINT32(tim_dier, STM32F2XXTimerState), + VMSTATE_UINT32(tim_sr, STM32F2XXTimerState), + VMSTATE_UINT32(tim_egr, STM32F2XXTimerState), + VMSTATE_UINT32(tim_ccmr1, STM32F2XXTimerState), + VMSTATE_UINT32(tim_ccmr2, STM32F2XXTimerState), + VMSTATE_UINT32(tim_ccer, STM32F2XXTimerState), + VMSTATE_UINT32(tim_psc, STM32F2XXTimerState), + VMSTATE_UINT32(tim_arr, STM32F2XXTimerState), + VMSTATE_UINT32(tim_ccr1, STM32F2XXTimerState), + VMSTATE_UINT32(tim_ccr2, STM32F2XXTimerState), + VMSTATE_UINT32(tim_ccr3, STM32F2XXTimerState), + VMSTATE_UINT32(tim_ccr4, STM32F2XXTimerState), + VMSTATE_UINT32(tim_dcr, STM32F2XXTimerState), + VMSTATE_UINT32(tim_dmar, STM32F2XXTimerState), + VMSTATE_UINT32(tim_or, STM32F2XXTimerState), + VMSTATE_END_OF_LIST() + } +}; + +static Property stm32f2xx_timer_properties[] = { + DEFINE_PROP_UINT64("clock-frequency", struct STM32F2XXTimerState, + freq_hz, 1000000000), + DEFINE_PROP_END_OF_LIST(), +}; + +static void stm32f2xx_timer_init(Object *obj) +{ + STM32F2XXTimerState *s = STM32F2XXTIMER(obj); + + sysbus_init_irq(SYS_BUS_DEVICE(obj), &s->irq); + + memory_region_init_io(&s->iomem, obj, &stm32f2xx_timer_ops, s, + "stm32f2xx_timer", 0x4000); + sysbus_init_mmio(SYS_BUS_DEVICE(obj), &s->iomem); + + s->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, stm32f2xx_timer_interrupt, s); +} + +static void stm32f2xx_timer_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + + dc->reset = stm32f2xx_timer_reset; + dc->props = stm32f2xx_timer_properties; + dc->vmsd = &vmstate_stm32f2xx_timer; +} + +static const TypeInfo stm32f2xx_timer_info = { + .name = TYPE_STM32F2XX_TIMER, + .parent = TYPE_SYS_BUS_DEVICE, + .instance_size = sizeof(STM32F2XXTimerState), + .instance_init = stm32f2xx_timer_init, + .class_init = stm32f2xx_timer_class_init, +}; + +static void stm32f2xx_timer_register_types(void) +{ + type_register_static(&stm32f2xx_timer_info); +} + +type_init(stm32f2xx_timer_register_types) diff --git a/include/hw/timer/stm32f2xx_timer.h b/include/hw/timer/stm32f2xx_timer.h new file mode 100644 index 0000000000..e6a83237a5 --- /dev/null +++ b/include/hw/timer/stm32f2xx_timer.h @@ -0,0 +1,101 @@ +/* + * STM32F2XX Timer + * + * Copyright (c) 2014 Alistair Francis <alistair@alistair23.me> + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ + +#ifndef HW_STM32F2XX_TIMER_H +#define HW_STM32F2XX_TIMER_H + +#include "hw/sysbus.h" +#include "qemu/timer.h" +#include "sysemu/sysemu.h" + +#define TIM_CR1 0x00 +#define TIM_CR2 0x04 +#define TIM_SMCR 0x08 +#define TIM_DIER 0x0C +#define TIM_SR 0x10 +#define TIM_EGR 0x14 +#define TIM_CCMR1 0x18 +#define TIM_CCMR2 0x1C +#define TIM_CCER 0x20 +#define TIM_CNT 0x24 +#define TIM_PSC 0x28 +#define TIM_ARR 0x2C +#define TIM_CCR1 0x34 +#define TIM_CCR2 0x38 +#define TIM_CCR3 0x3C +#define TIM_CCR4 0x40 +#define TIM_DCR 0x48 +#define TIM_DMAR 0x4C +#define TIM_OR 0x50 + +#define TIM_CR1_CEN 1 + +#define TIM_EGR_UG 1 + +#define TIM_CCER_CC2E (1 << 4) +#define TIM_CCMR1_OC2M2 (1 << 14) +#define TIM_CCMR1_OC2M1 (1 << 13) +#define TIM_CCMR1_OC2M0 (1 << 12) +#define TIM_CCMR1_OC2PE (1 << 11) + +#define TIM_DIER_UIE 1 + +#define TYPE_STM32F2XX_TIMER "stm32f2xx-timer" +#define STM32F2XXTIMER(obj) OBJECT_CHECK(STM32F2XXTimerState, \ + (obj), TYPE_STM32F2XX_TIMER) + +typedef struct STM32F2XXTimerState { + /* <private> */ + SysBusDevice parent_obj; + + /* <public> */ + MemoryRegion iomem; + QEMUTimer *timer; + qemu_irq irq; + + int64_t tick_offset; + uint64_t hit_time; + uint64_t freq_hz; + + uint32_t tim_cr1; + uint32_t tim_cr2; + uint32_t tim_smcr; + uint32_t tim_dier; + uint32_t tim_sr; + uint32_t tim_egr; + uint32_t tim_ccmr1; + uint32_t tim_ccmr2; + uint32_t tim_ccer; + uint32_t tim_psc; + uint32_t tim_arr; + uint32_t tim_ccr1; + uint32_t tim_ccr2; + uint32_t tim_ccr3; + uint32_t tim_ccr4; + uint32_t tim_dcr; + uint32_t tim_dmar; + uint32_t tim_or; +} STM32F2XXTimerState; + +#endif /* HW_STM32F2XX_TIMER_H */ |